salak96 / express-nodejs

Tutorial Install Express in Node.js

• 1. Create folder in PC

mkdir express
cd express

• 2. Create package.json

npm init -y

• 3. Install express

npm install express

• 4. install nodemon

# mac or linux
npm install --save-dev nodemon
# windows
npm install nodemon -g

• 5. Create index.js

const express = require('express');
const app = express();
app.get('/', (req, res) => {
    res.send('Hello World!');
});
app.listen(3000, () => {
    console.log('Example app listening on port 3000!');
});

• 6. Run index.js

node index.js

• 7. edit package.json

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "nodemon index.js"
  },

• 8. Install Prettier

npm install --save-dev --save-exact prettier

• 9. Create .prettierrc.json

touch .prettierrc.json

• 10. edit .prettierrc.json

{
    "tabWidth": 4,
    "singleQuote": true,
    "jsxSingleQuote": true,
    "semi": true,
    "printWidth": 150,
    "bracketSpacing": true,
    "braceSameLine": true
}

• 11. Run prettier

prettier --write .

• 12. edit package.json

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "dev": "nodemon index.js",
    "format": "prettier --write ."
  },

• 13. Run index.js

npx prettier --write .